$200 Cdn for a CD400A? You can't do much better than that for a 450w amp. It's small, powerful, and the price is great. That's like $170 US. I've got the same amp powering my MBs up front and it sounds wonderful. It'll be perfect for a sub, too. I had it running two Type-Ss for about two weeks, before I upgraded, and I haven't used it in nearly a year. It's great for the price, believe me.